pact-dmbr耦合工艺深度处理印染废水试验分析

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1、宁波大学硕士学位论文AdvancedTreatmentofTextileWastewaterinDynamicMembrane-BioreactorCoupledwithPowderedActivatedCarbonTechnologyAbstractBasedontheunderstandingofthepollutantscharacteristicsandpollutioncontrolrequirementsoftextileindustry,anovalprocessofthedynamicmembranebioreact

2、orcoupledwithpowderdactivatedcarbontechnology(PACT-DMBR)wasproposedtocarryoutadvancedtreatmentoftextilewastewater.Afteradetailedreviewofrelevantliteraturesoftextilewastewatertreatment,experimentsofsludgeconditioningwithfilteraidswereconductedtoexplorethemechanismofmemb

3、ranefoulingcontrol,followedbybench-scale,pilot-scaletoindustry-scalePACT-DMBRtestsofsimulatedandrealistictextilewastewater,withorwithoutpreliminaryandpost-treatment.Testsofsludgeconditioningwith2kindsoffilteraidspowderedactivatedcarbon(PAC)andwoodfiberpulp(WFP)werecond

4、uctedwithfiltrationspecificresistancemeasurement.Resultsindicated,withthesludgeconcentrationof8906mg/L,thespecificresistanceofsludgecouldbe9292decreasedfrom7.95×10s/gwithoutPACdosageto2.43×10s/gwithPACdosageof7.5g/L,92thespecificresistanceofsludgecouldbedecreasedfrom7.

5、95×10s/gwithnoWFPdosageto922×10s/gwithWFPdosageof3.0g/L.Bestfiltrationperformanceofsludgeconditionwithlowestspecificfiltrationresistencecouldbeobtainedatmixeddosingwithfilteraidstosludgeconcentrationratiosof0.84forPACand0.34forWFP.Bench-scaletestsofsimulatedtextilewast

6、ewatertreatmentwereconductedwithDMBRcomposedofnon-wovenfabricasmembranematerialwithadditionofPACatdosageof4g/L.ResultsindicatedthatforsimulatedinfluenttextilewastewaterwithCODCratabout400mg/L,the2DMBRunityieldedamembranefluxof20L/(m·h)alongwiththeaveragedremovalratesof

7、CODCr,turbidityandUV254at90%,97%and95%respectively.ComparedwiththoseofnoPACdosage,thoseofPACT-DMBRwere5%,3%and5%higherrespectively.ThecontinuousrunningtimeoftheDMBRsystemwasextendedfrom29dto38dwithPACdosageof4g/L.PilottestsofPACT-DMBRwithhollow-fiberandflat-platemembra

8、nemodelswerecarriedoutwithrealistictextilewastewaterfromtheaerationtankastheinfluent.Withhydraulicretention2time11.7h